Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são as perdas de Warrnambool com um sorteio inferior a 19?
 ###Tabelas: CREATE TABLE u.s._nielsen_ratings (u.s._nielsen_ratings_id AUTO_INCREMENT PRIMARY KEY, Episode INT, First Air Date VARCHAR, Rating (18–49) VARCHAR, Share (18–49) INT, Viewers (millions) VARCHAR, Rank (timeslot) VARCHAR, Rank (night) VARCHAR) CREATE TABLE greatest_winning_margins (greatest_winning_margins_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Margin VARCHAR, Club VARCHAR, Opponent VARCHAR, Year VARCHAR, Round VARCHAR, Venue VARCHAR) CREATE TABLE win_loss_record (win_loss_record_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Active VARCHAR, Wins INT, Losses INT, Draws INT, Percentage wins VARCHAR, Flags INT) CREATE TABLE lner (lner_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Wheel Arrangement VARCHAR, Railway VARCHAR, Number at Doncaster INT, Number at Pyewipe INT, Number at March INT) CREATE TABLE race_performances (race_performances_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Placing VARCHAR, Beat by VARCHAR, Location VARCHAR, Distance VARCHAR)  
SELECT AVG Losses FROM win_loss_record WHERE Club = warrnambool AND Draws < 19